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Effects of gastric distension on intraabdominal pressures in horses
Author(s) -
Barrett Elizabeth J.,
Munsterman Amelia S.,
Hanson R. Reid
Publication year - 2013
Publication title -
journal of veterinary emergency and critical care
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.886
H-Index - 47
eISSN - 1476-4431
pISSN - 1479-3261
DOI - 10.1111/vec.12065
Subject(s) - medicine , stomach , distension , cannula , abdominal distension , anesthesia , cuff , perfusion , surgery , nuclear medicine , gastroenterology
Abstract Objective To determine the effect of gastric distension on intraabdominal pressures (IAP) measured directly from the intraperitoneal space. Design Prospective, experimental study. Setting A university‐based equine research facility. Animals Ten healthy adult horses, 5 males and 5 females. Interventions Intraabdominal pressures were measured through an intraperitoneal cannula zeroed at a height midway between the height of the tuber ishii and point of the shoulder at 6 time points: at rest, after placement of a nasogastric tube, and after instillation of each 5 L increment up to a total of 20 L of water. Simultaneously, mean arterial pressures (MAP) were obtained using a tail cuff, and abdominal perfusion pressures (APP) were calculated using the measured IAP minus the measured MAP. Measurements and Main Results Baseline direct IAP measurements were subatmospheric (–4.5 ± 3.0 cm H 2 O). IAPs were not significantly affected by placement of a nasogastric tube (–2.69, 95% CI [–3.24, –2.14], P = 0.4195), but were significantly increased after placement of 5 L (–1.73, 95% CI [–2.28, –1.18], P = 0.0015), 10 L (–0.54, 95% CI [–1.09,0.01], P = 0.0001), 15 L (0.89, 95% CI [0.34, 1.44], P = 0.0001), or 20 L (3.08, 95% CI [2.53, 3.63], P = 0.0001) of water into the stomach. APPs were not significantly different for any volume of fluid infused into the stomach ( P = 0.05 for all comparisons). Conclusion IAPs were significantly increased when > 5 L of water was infused into the stomach. These results indicate the need for further research in clinical cases to determine the relationship between gastric pressures and the development of intraabdominal hypertension in horses.